We understand the importance of sharing UI ideas with an URL. Since it is easy to share, viewers need not signup and best of all it can be hyperlinked inside documents. Which is why the "create project link" in MockFlow dialog box offers many options for a better viewing experience like allowing export access, anonymous comments, default project view mode. Also the user can enter a custom URL for the project.
Today's update provides an additional option that lets project owners and admins to secure their project link with a pass key.
How it works

Although it may not be as secure as adding members to the project. The "Protect URL with key" feature is a very useful option just like encrypted PDFs giving a security wall for your public facing UI idea. Also we are sure clients will appreciate it as they need not have a MockFlow account to access the project.
So share your UI idea URLs in email, chat, forum, freelancing website with pass key protection. Incase you feel the pass key is compromised, it can be changed all in the cloud with affecting the original URL.
Note: Passkey protection of project links is a paid only feature which is not available for the free Basic plan. Upgrade to access.
Example
URL: https://wireframepro.mockflow.com/view/foodrecipeapp
Psst.. the key is: keytest21
Tip: Not a good practice to share the key along with the URL. It is best to share them in separate messages or different mediums.